com.glaf.chart.util.ChartUtils.java Source code

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Here is the source code for com.glaf.chart.util.ChartUtils.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.glaf.chart.util;

import java.awt.Font;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.encoders.EncoderUtil;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.servlet.ServletUtilities;

import com.glaf.chart.domain.Chart;

public class ChartUtils {

    public static byte[] createChart(Chart chartModel, JFreeChart chart) {
        ByteArrayOutputStream baos = null;
        BufferedOutputStream bos = null;
        try {
            baos = new ByteArrayOutputStream();
            bos = new BufferedOutputStream(baos);
            java.awt.image.BufferedImage bi = chart.createBufferedImage(chartModel.getChartWidth(),
                    chartModel.getChartHeight());

            if ("png".equalsIgnoreCase(chartModel.getImageType())) {
                EncoderUtil.writeBufferedImage(bi, chartModel.getImageType(), bos);
                ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
                ServletUtilities.saveChartAsPNG(chart, chartModel.getChartWidth(), chartModel.getChartHeight(),
                        info, null);
            } else if ("jpeg".equalsIgnoreCase(chartModel.getImageType())) {
                EncoderUtil.writeBufferedImage(bi, chartModel.getImageType(), bos);
                ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
                ServletUtilities.saveChartAsJPEG(chart, chartModel.getChartWidth(), chartModel.getChartHeight(),
                        info, null);
            }

            bos.flush();
            baos.flush();

            return baos.toByteArray();

        } catch (Exception ex) {
            throw new RuntimeException(ex);
        } finally {
            IOUtils.closeQuietly(baos);
            IOUtils.closeQuietly(bos);
        }
    }

    public static void createChart(String path, Chart chartModel, JFreeChart chart) {
        try {
            java.awt.image.BufferedImage bi = chart.createBufferedImage(chartModel.getChartWidth(),
                    chartModel.getChartHeight());

            String name = chartModel.getChartName();
            if (StringUtils.isNotEmpty(chartModel.getMapping())) {
                name = chartModel.getMapping();
            }

            if ("png".equalsIgnoreCase(chartModel.getImageType())) {
                EncoderUtil.writeBufferedImage(bi, chartModel.getImageType(),
                        new FileOutputStream(path + "/" + name + ".png"));
                ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
                ServletUtilities.saveChartAsPNG(chart, chartModel.getChartWidth(), chartModel.getChartHeight(),
                        info, null);
            } else if ("jpeg".equalsIgnoreCase(chartModel.getImageType())) {
                EncoderUtil.writeBufferedImage(bi, chartModel.getImageType(),
                        new FileOutputStream(path + "/" + name + ".jpg"));
                ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
                ServletUtilities.saveChartAsJPEG(chart, chartModel.getChartWidth(), chartModel.getChartHeight(),
                        info, null);
            }

        } catch (Exception ex) {
            ex.printStackTrace();
            throw new RuntimeException(ex);
        }
    }

    public static void setChartTheme(Chart chartModel) {
        // ?
        StandardChartTheme standardChartTheme = new StandardChartTheme("cn");
        // 
        if (chartModel.getChartTitleFont() != null && chartModel.getChartTitleFontSize() != null
                && chartModel.getChartTitleFontSize() > 0) {
            standardChartTheme.setExtraLargeFont(
                    new Font(chartModel.getChartTitleFont(), Font.BOLD, chartModel.getChartTitleFontSize()));
        } else {
            standardChartTheme.setExtraLargeFont(new Font("", Font.BOLD, 18));
        }
        if (chartModel.getChartFont() != null && chartModel.getChartFontSize() > 0) {
            // 
            standardChartTheme
                    .setRegularFont(new Font(chartModel.getChartFont(), Font.PLAIN, chartModel.getChartFontSize()));
            // ?
            standardChartTheme
                    .setLargeFont(new Font(chartModel.getChartFont(), Font.PLAIN, chartModel.getChartFontSize()));
        } else {
            // 
            standardChartTheme.setRegularFont(new Font("", Font.PLAIN, 14));
            // ?
            standardChartTheme.setLargeFont(new Font("", Font.PLAIN, 14));
        }
        // ?
        ChartFactory.setChartTheme(standardChartTheme);
    }

}